Window lock



zms sso A C C E M V WINDOW LOCK Filed Jan. 50, 1935 INVENTOR.

Patented Dec. 10, 1935 UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to improvements in window locks in which provision is made for securely locking the two sashes of said window together in closed as well as partially opened positions.

An object of the invention is to provide a simple cheap lock which may be easily applied to the window. Another object resides in the provision of positive means, in a lock of the above character, for drawing the two sashes tightly together as Well as holding them firmly under vertical pressure in a closed position. Further objects of the invention are hereinafter set forth.

Heretofore window locks have been manufactured in which a bolt has been employed that is adapted to be actuated in a vertical plane to a locking position. Such devices are incapable of locking the sashes in other than closed position, nor are they effective to hold the sashes under tension vertically to prevent rattling. Other forms of window locks include springs and cam surfaces, which latter have frictional engagement rendering the look more difficult to operate.

My improved lock is designed to effectively close easily, and following which it may be as easily tightened. But even although it should not be fully tightened it still cannot be opened from the 0 utside of the window.

My invention is fully set forth in detail in the following specification and drawing forming a part thereof in which latter I have illustrated a preferred embodiment of my invention.

Referring to such drawing,

Figure 1 is an inside elevation of a portion of the two closed sashes of a window with my improved lock shown applied thereto in locked position.

Figure 2 is a vertical section through the sashes taken on the line 22 of Figure 1, with the lock in elevation, and,

Figure 3 is a perspective view of the lock with the two cooperating parts in relative positions but abnormally separated to better illustrate details otherwise hidden.

In Figure 2 portions of an upper sash l0 and a lower sash II are shown with both in closed position. Each is provided with the usual cross frames l2 and I3 respectively, the tops of which are commonly in substantially the same plane when the sashes are closed, but with the said frames usually somewhat separated transvesely from each other.

Upon the top of frame I 2 of sash H) a bracket 14 is secured as by screws l5. Bracket l4 has a base l6 suitably apertured to receive screws l5, and another portion I! extending upwardly perpendicular to base It. Portion I1 is reinforced by a column l8, and is provided with a slot 19 extending transversely from one edge to beyond 5 the vertical center line of the piece. This slot also extends rearwardly and bisects the column I 8, so as to provide a lug |8a at the top of said column. The lower surface of slot I9 is preferably inclined downwardly from the horizontal 10 toward its open end as at l9a.

,A bolt 20 is adapted to extend through slot IS with its rear end below lug la and above the top surface of the lower part of column H3. The upper portion of the latter and the lug Isa. are 15 drilled to loosely receive a pin 21 having a drive fit through bolt 20. Sufficient clearance is provided so that the pin and bolt are free to move together to a limited extent in a vertical plane. The bolt may thus be swung. about the 20 pin 2| through and out of slot l9.

The other end of bolt 20 is threaded to receive a wing nut 22.

Another angle bracket or fitment 23 is provided with an upright portion 24 and a base 25, the latter being apertured to receive screws 26 by which the bracket may be secured to the top of frame I3 of the lower sash II.

The bracket 23 may be reinforced by rib 21, and the part 24 may be provided with a slot, or a plurality of slots, two in this instance, 28 and 29. The lower surface 28a of slot 28 is also preferably slightly inclined similar to slot l9, as shown in Figure 1.

With the brackets mounted as shown in Figure 1, with the top surfaces of frames 12 and I3 in substantially the same plane, the slot 28 will be slightly higher than slot I9. If the frames are not in a position corresponding to the above when the sashes are closed, then either bracket may be adjusted by the use of shims of paper or other suitable material so that the aforesaid slots will be offset with respect to each other, as above described, for the effective operation of bolt 20. 45

When the sashes H2 and II are closed with brackets l4 and 23 in the relative position shown in Figures 1 and 2, the bolt 20 may be rotated about pin 2| after first unscrewing the wing nut 22 sufiiciently to allow the bolt to swing 50 through and out of engagement with the slots l9 and 28, to thus unlock the window and permit the sashes to be opened without interference with the bolt. When the bolt is clear of both slots it will be supported on the top of column I 8.

To look the sashes in a closed position the bolt is swung in an opposite direction from the above. and since the pin 2| is loosely mounted within column I8, and because of the aforesaid clearance, the bolt 20 together with pin 2| will be free to move upwardly and permit the bolt to ride up the inclined surface 28a of slot 28, and when further rotated will press against the upper surface of slot IS, the said surfaces of the twoslots tending to wedge the sashes firmly closed. The nut 22 may then be tightened to draw the sashes together. These combined operations will effectively eliminate any tendency of the sashes to rattle.

If it is desired to lock the sashes in a partially open position slots l9 and 29 may be brought into registration by moving raising the lower one. The bolt may then be applied to lock them together. They may then be raised or lowered together to an extent limited by the distance between slots 28 and 29.

Various modifications within the scope of the appended claims may be made without departing from the spirit of my invention.

I claim:

1. A window lock comprising a bolt adapted to swing in a plane substantially normal to the sash movement, a support to which said bolt is pivoted, a fitment adapted to be secured to the sash which is movable with respect to said support, said fitment having a slightly inclined surface along which said bolt is swung in moving about its pivot into locked position, whereby said sash is tightly closed by said bolt in moving to its closed position, said bolt having at least a limited movement in a plane normal to the plane of its swinging movement, and an abutment surface substantially co-extensive with said inclined surface, secured to said bolt support close to said inclined surface and adapted to engage the opposite side of said bolt from said inclined surface for transmitting the thrust of tightly closing said sash, whereby the stress on said bolt during its movement along said inclined surface in tightly closing said sash may be principally that of shear and without any sub: stantial fiexure to said bolt support.

2. A window lock comprising a bolt adapted to swing in a plane substantially normal to the sash movement, a support to which said bolt is pivoted, a fitment adapted to be secured to the sashwhich is movable with respect to said support, said fitment having a slightly inclined surface along which said bolt is swung in moving about its pivot into locked position, whereby said sash is tightly closed by said bolt in moving to its closed position,

and an abutment surface substantially co-extensive with said inclined surface, secured to said bolt support close to said inclined surface and adapted to engage the opposite side of said bolt from said inclined surface for transmitting the thrust of tightly closing said sash.

3. A window lock comprising a bolt adapted to swing in a plane substantially normal to the sash movement, a support to which said bolt is pivoted, a fitment adapted to be secured to the sash which is movable with respect to said support, said fitthe upper sash down or ment having a slightly inclined surface along which said bolt is swung in moving about its pivot into locked position, whereby said sash is tightly closed by said bolt in moving to its closed position, and an abutment surface substantially co-extensive with said inclined surface, secured to said bolt support close to said inclined surface and adapted to engage the opposite side of said bolt from said inclined surface for transmitting the thrust of tightly closing said sash, and another bolt guide surface opposite said abutment on said bolt support, with which said bolt may cooperate in swinging into a closed.position, said fitment having a bolt receiving slot between its inclined surface and the sash to which it is attached, whereby said sash may be locked in a partially opened position.

4. A window lock comprising a bolt adapted to swing in a plane substantially normal to the sash movement, a support to which said bolt is pivoted, a fitment adapted to be secured to the sash which is movable with respect to said support, said fitment having a slightly inclined surface along which said bolt is swung in moving about its pivot into locked position, whereby said sash is tightly closed by said bolt in moving to its closed position, and an abutment surface substantially coextensive with said inclined surface, secured to said bolt support close to said inclined surface and adapted to engage the opposite side of said bolt from said inclined surface for transmitting the thrust of tightly closing said sash, and another bolt guide surface opposite said abutment on said bolt support, with which said bolt may cooperate in swinging into a closed position, said fitment having a bolt receiving slot between its inclined surface and the sash to which it is attached, whereby said sash may be locked in a partially opened position, said bolt guide surface opposite said abutment being inclined at about the angle of the inclined surface on said fitment.

5. A window lock. comprising a bolt adapted to swing in a plane substantially normal to the sash movement, a support to which said bolt is pivoted, a fitment adapted to be secured to the sash which is movable with respect to said support, said fitment having a slightly inclined surface along which said bolt is swung in moving about its pivot into locked position, whereby said sash is tightly closed by said bolt in moving to its closed position, said bolt having at least a limited movement in a plane normal to the plane of its swinging movement, and an abutment surface substantially co-extensive with said inclined surface, secured to said bolt support close to said inclined surface and adapted to engage the opposite side of said bolt from said inclined surface for transmitting the thrust of tightly closing said sash, whereby the stress on said bolt during its movement along said inclined surface in tightly closing said sash may be principally that of shear and without any substantial fiexure, and a wing nut on said bolt adapted to engage a side of said fitment and clamp said sash against rattling with respect to the bolt support.

VINCENZO MECCA. 

